This is a multinational, randomized (1:1), double blind, double dummy, comparator-controlled, 2 parallel treatment group study in subjects from 6 months to < 13 years of age, with Streptococcus pyogenes tonsillitis/pharyngitis (T/P).Each subject will receive either telithromycin 25 mg/kg once daily for 5 days or penicillin V, 13.3 mg/kg three times daily for 10 days. Matching placebo for telithromycin and penicillin V will also be dispensed for 5 and 10 days respectively, to provide blinding to the different treatment regimens. A positive rapid identification test for streptococcal Group A antigen will be required for all subjects at Visit 1 (Day 1) for entry into the study. Throat swab specimens for bacterial culture, identification, and antibiotic-susceptibility testing will be taken at Visits 1, 3 and 4.